Sharp 15JF-25S, Service Manual

Page: 18 / 37

23
15JF-25S
TDA93XX
(IC801)
Block
Diagram
SOUND
TRAP
TUNERAGC
+8V
HOUT V-DRIVE
RO
GO
B0
BCLIN
BLKIN
CVBS/Y
IFIN
A
UDOUT
AUDEXT
Block diagram TDA935X/6X8X PS/N2 with mono intercarrier sound demodulator
CHROMA
SDA SCL
VISION IF
ALIGNMENT-FREE
PLL DEMOD.
AGC/AFC
VIDEO AMP.
VIDEO SWITCH
VIDEO IDENT.
VIDEO FILTERS
PAL/SECAM/NTSC
DECODER
DEEMPHASIS
AUDIO SWITCH
(AVL)
VOLUME CONTROL
BASE-BAND
DELAY LINE
H/V SYNC SEP.
H-OSC. + PLL
H-DRIVE
2
nd
LOOP
H-SHIFT
V-DRIVE +
CONTR/BRIGHTN
OSD/TEXT INSERT
CCC
WHITE-P. ADJ.
80C51 CPU
I
2
C-BUS
TRANSCEIVER
ROM/RAM
TELETEXT
ACQUISITION
1/10 PAGE
MEMORY
TELETEXT/OSD
DISPLAY
R G B BL
Y
U
V
H
V
REF
ENHANCED
VST PWM-DAC
VST OUT
I/O PORTS
I/O PORTS (4x)
+3.3 V
RESET
LED OUT (2x)
ADC IN (4x)
VPE
(EW GEOMETRY)
GEOMETRY
EHTO
EWD
R/V G/Y B/U BL
RGB/YUV INSERT
R G B
REF
CVBS
SYNC
H
V
COR
27 37 38
33
(20) 29 28
34
44 60 55 59 58 57
10/11
2 3 4
5-8
1+62-64
9
12
54 56 61
51
52
53
49
50
45 48 47 46
(20)
36
21
22 26 25
16
35
17
31
15
19
14
39
18
41
(32)
13
43
42
40
24
23
RGB/YUV MATRIX
SATURATION
YUV/RGB MATRIX
30
LUMA DELAY
PEAKING
BLACK STRETCH
AGC CIRCUIT
NARROW BAND
PLL
DEMODULATOR
(32)
(32)
SNDIF